EP 3717941 A4 20210825 - PEROVSKITE MANGANESE OXIDES WITH STRONG MAGNETOCALORIC EFFECT AND USES THEREOF
Title (en)
PEROVSKITE MANGANESE OXIDES WITH STRONG MAGNETOCALORIC EFFECT AND USES THEREOF
Title (de)
PEROWSKITMANGANOXIDE MIT STARKER MAGNETOKALORISCHER WIRKUNG UND VERWENDUNGEN DAVON
Title (fr)
OXYDES DE MANGANÈSE DE TYPE PÉROVSKITE À FORT EFFET MAGNÉTOCALORIQUE ET LEURS UTILISATIONS
Publication
Application
Priority
- US 201762593443 P 20171201
- US 2018063523 W 20181201
Abstract (en)
[origin: WO2019109059A1] In various aspects, methods of making perovskite manganese oxide particles are provided as well as perovskite manganese oxide particles made therefrom. The perovskite manganese oxide particles exhibit a strong magnetocaloric effect, making them well suited for applications in power generation and magnetic refrigeration, especially at or near room temperature. The methods can include forming an aqueous mixture of (i) a low-molecular-weight polymeric polyalcohol gel precursor, (ii) a stoichiometric amount of metal salts or hydrates thereof, wherein the metal salts or hydrates thereof comprise at least a Manganese (Mn), and (iii) a polybasic carboxylic acid; polymerizing the aqueous mixture to form a gel containing perovskite manganese oxide nanoparticles entrapped therein; and calcining the gel to remove at least a portion of organic material in the gel and form the perovskite manganese oxide particles. Method and systems are also provided for power generation and magnetic refrigeration using the perovskite manganese oxide particles.
IPC 8 full level
H01F 1/01 (2006.01)
CPC (source: EP US)
F25B 21/00 (2013.01 - US); H01F 1/012 (2013.01 - US); H01F 1/017 (2013.01 - EP); F25B 2321/002 (2013.01 - US); Y02B 30/00 (2013.01 - EP)
Citation (search report)
- [YA] US 2012033002 A1 20120209 - SEELER FABIAN [DE], et al
- [XYI] TSUI ET AL: "Enhanced near room temperature magnetocaloric effect in La 0.6 Ca 0.4 MnO 3 for magnetic refrigeration application", RSC ADV., vol. 7, no. 74, 2 October 2017 (2017-10-02), pages 46589 - 46593, XP055616135, DOI: 10.1039/C7RA06619H
- [XAYI] ZHONG ET AL: "Dependence of the magnetocaloric effect on oxygen stoichiometry in polycrystalline La"2"/"3Ba"1"/"3MnO"3"-"@d", JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, vol. 261, no. 1-2, 1 April 2003 (2003-04-01), pages 238 - 243, XP004456798, ISSN: 0304-8853, DOI: 10.1016/S0304-8853(02)01479-8
- [XAYI] LÓPEZ ET AL: "Specific heat and magnetic properties of Nd0.5Sr0.5MnO3 and R0.5Ca0.5MnO3 (R=Nd, Sm, Dy, and Ho)", JOURNAL OF APPLIED PHYSICS, vol. 94, no. 7, 1 October 2003 (2003-10-01), pages 4395 - 4399, XP012060273, ISSN: 0021-8979, DOI: 10.1063/1.1606517
- [XAYI] ZHONG ET AL: "Synthesis, structure and magnetic entropy change of polycrystalline La"1"-"xK"xMnO"3"+"@d", JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, vol. 195, no. 1, 1 April 1999 (1999-04-01), pages 112 - 118, XP004166694, ISSN: 0304-8853, DOI: 10.1016/S0304-8853(98)01080-4
- See references of WO 2019109059A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2019109059 A1 20190606; EP 3717941 A1 20201007; EP 3717941 A4 20210825; US 11670441 B2 20230606; US 2020294697 A1 20200917
DOCDB simple family (application)
US 2018063523 W 20181201; EP 18884591 A 20181201; US 201816768173 A 20181201